To my knowledge it originates from "pimp my ride" which is a somewhat popular tv show where they upgrade people's cars. A pimp, of course, is a man who controls prostitutes and they're known for having "pimped out" cars. Cars with lots of "upgrades".

To my knowledge it originates from "pimp my ride" which is a somewhat popular tv show where they upgrade people's cars. A pimp, of course, is a man who controls prostitutes and they're known for having "pimped out" cars. Cars with lots of "upgrades".